+0
an uniform group or a uniform group? an office building or a office building?
+0
"a uniform group"

"an office building"
+0
The A/AN rule, which you should know, says that it depends on whether or not the word following A/AN STARTS with a vowel sound.

UNIFORM is pronounced "YOO-nih-form", which starts with a consonant sound, the "Y", which is pronounced as a consonant ("Yuh") not a vowel. So it's "A UNIFORM".

OFFICE starts with a vowel sound, so it's "AN OFFICE".
Site Hint: Check out our list of pronunciation videos.
Comments  
I think the word "An" sounds better to me then "A"
Students: We have free audio pronunciation exercises.

gd7tgrtrfegegd



ggrgtt5t44rdgsg

Vhloعفول